Fun Riddles

Question: A man entered a house. There was no one else in the house. He walked in to a room, stopped, and slowly raised his hands above his head. After a moment, he turned around, let out a laugh, and left. Why?

Question: i have a house but it doesnt have a door?

Question: What season is it when you are on a trampoline?

Question: Which book will never be written?

Question: What do you get when you cross a witch with sand?